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High-activity oxygen carrier and preparation method and application thereof

A technology of oxygen carrier and carrier, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, inorganic chemistry, etc. Live and other problems, to achieve the effect of less carbon accumulation, good stability and high activity

Active Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relatively speaking, the comprehensive performance of NiO oxygen carrier is better, but the dispersion of metal oxides in the oxygen carrier is not high, and the active component NiO is easy to interact with the carrier during high temperature and / or long-term operation. It is easily inactivated and affects stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take a certain amount of silica gel raw material into the container, add deionized water to stir and wash, set the speed of the stirring device at 400 r / min, and perform suction filtration after washing for 1 h. Then wash again under the same conditions, a total of 3 times. The washed clean silica gel particles were dried in a blast drying oven at a temperature of 120 °C for 12 h. Then sieve and take 40-60 mesh SiO 2 The particles were temperature-programmed calcined in a muffle furnace, and finally calcined at 900 °C for 4 h. Using the volume impregnation method, 1mol . L -1 Calcium nitrate loaded on SiO 2 , then dried at room temperature, then dried at 100°C for 8 hours, and then calcined at 800°C for 4h to obtain CaO / SiO 2 . 1 mol of . L -1 Ni(NO 3 ) 2 ·6H 2 O loaded on CaO / SiO 2 , then dried at room temperature, then dried at 100 °C for 8 hours, and then fired at 1000 °C for 4 h to obtain NiO / CaO / SiO 2 The oxygen carrier is based on the weight content o...

Embodiment 2

[0020] Take a certain amount of silica gel raw material into the container, add deionized water to stir and wash, set the speed of the stirring device at 400 r / min, and perform suction filtration after washing for 1 h. Then wash again under the same conditions, a total of 3 times. The washed clean silica gel particles were dried in a blast drying oven at a temperature of 120 °C for 12 h. Then sieve and take 40-60 mesh SiO 2 The particles were temperature-programmed calcined in a muffle furnace, and finally calcined at 900 °C for 4 h. Using the volume impregnation method, 1mol . L -1 Calcium nitrate loaded on SiO 2 , then dried at room temperature, then dried at 100°C for 8 hours, and then calcined at 800°C for 4h to obtain CaO / SiO 2 . 1 mol of . L -1 Ni(NO3 ) 2 ·6H 2 O loaded on CaO / SiO 2 , then dried at room temperature, then dried at 100 °C for 8 hours, and then fired at 1000 °C for 4 h to obtain NiO / CaO / SiO 2 The oxygen carrier is based on the weight content of ...

Embodiment 3

[0022] Take a certain amount of silica gel raw material into the container, add deionized water to stir and wash, set the speed of the stirring device at 400 r / min, and perform suction filtration after washing for 1 h. Then wash again under the same conditions, a total of 3 times. The washed clean silica gel particles were dried in a blast drying oven at a temperature of 120 °C for 12 h. Then sieve and take 40-60 mesh SiO 2 The particles were temperature-programmed calcined in a muffle furnace, and finally calcined at 900 °C for 4 h. Using the volume impregnation method, 1mol . L -1 Calcium nitrate loaded on SiO 2 , then dried at room temperature, then dried at 100°C for 8 hours, and then calcined at 800°C for 4h to obtain CaO / SiO 2 . 1 mol of . L -1 Ni(NO 3 ) 2 ·6H 2 O loaded on CaO / SiO 2 , then dried at room temperature, then dried at 100 °C for 8 hours, and then fired at 1000 °C for 4 h to obtain NiO / CaO / SiO 2 The oxygen carrier is based on the weight content o...

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PUM

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Abstract

The invention discloses an oxygen carrier, which employs SiO2 as a carrier, NiO as an active component and CaO as an additive. The oxygen carrier comprises, by weight, 1-30% preferably 5-20% of the active component NiO, 1-20% preferably 1-10% of the additive CaO, and the balance of the carrier SiO2. A preparation method of the oxygen carrier is by successively loading CaO and NiO with SiO2 as the carrier by an impregnation method. The preparation method of the oxygen carrier is simple, the active component has small particle size, uniform dispersion and weak interaction force with the carrier, and the oxygen carrier has the advantages of high activity stability under high temperature and / or long period operation in chemical chain hydrogen production or combustion reaction process.

Description

technical field [0001] The invention relates to an oxygen carrier and its preparation method and application, belonging to the catalyst technology in the field of chemical looping combustion or hydrogen production. Background technique [0002] At present, with the rapid growth of population, the continuous deepening of industrialization and the increasing demand for energy, electricity generation based on fossil fuels not only meets the energy demand, but also brings great environmental hazards. CO emitted 2 lead to atmospheric CO 2 Concentrations are increasing, and the greenhouse effect is increasing, so CO from the combustion of fossil fuels 2 The control and reduction of emissions has been closely watched by the international community. [0003] CO with improved power generation efficiency and the use of other fuels with lower C / H and renewable resources 2 control route compared to coal and other fossil fuels during electricity production for CO 2 Recovery and stor...

Claims

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Application Information

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IPC IPC(8): B01J23/78C10L10/00C01B3/40
CPCY02P20/52
Inventor 梁皓倪向前张舒冬张喜文
Owner CHINA PETROLEUM & CHEM CORP
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